Many enzymes consist of a protein and a non-protein (called the cofactor). The proteins in enzymes are usually globular. The intra- and intermolecular bonds that hold proteins in their secondary and tertiary structures are disrupted by changes in temperature and pH. This affects shapes and so the catalytic activity of an enzyme is pH and temperature sensitive.
Everyday in the U.S. millions of cars and trucks idle needlessly, sometimes for hours. You may not be able to avoid keeping your engine running when youâre stopped at a traffic signal or stuck in slow-moving traffic. But other times idling is unnecessary. An idling car can release as much pollution as a moving car.
The device has an on-board accelerometer. If the device sits still for 20 seconds, it goes into standby mode (lower heat setting, around 150C). Pick the device up or move it, and it will heat up to the last temperature setting selected. If the device sits still for 3 minutes, it will shut off. A bumpy car ride is enough motion to keep the device awake.